Introduction to Art: Design, Context, and Meaning: This books offers a comprehensive introduction to the world of Art.
The Basic Elements of Music (OpenStax CNX): Open book covers “time elements,” “pitch elements,” and “combining time and pitch”.
Introduction to Music Appreciation: This book “is about listening, appreciating, understanding, and discussing music. It explores the history, aesthetics, and criticism of Western music for an enhanced understanding of the topic.
Open Music Theory x CUNY: A free, open-source, online textbook remixed from Open Music Theory. The resources in this edition have been designed to support music theory courses at York College/CUNY.
A Quick and Dirty Guide to Art, Music, and Culture: This is a guidebook to a web resource of Artist and Musician biographies (http://aaep1600.osu.edu) by Clayton Funk of The Ohio State University.
Understanding Basic Music Theory (OpenStax CNX): Open book that covers the “bare essentials of music theory.”
Understanding Music: Past and Present: The text covers the fundamentals of music and the physics of sound, an exploration of music from the Middle Ages to the present day, and a final chapter on popular music in the United States.”
Art and Music since 1945: Course site includes syllabus, readings, and lectures, and follows the open guidebook “A Quick and Dirty Guide to Art, Music, and Culture.”
Introduction to Music (Saylor Academy): This course provides an introductory survey of the Western classical tradition, exploring music both as a phenomenon of sound and culture.
Music: Its Language, History, and Culture (Brooklyn College): Open course site with music OER and textbook in both PDF and interactive formats.
Sound Reasoning: A New Way to Listen: This course encourages you to be self-reliant–to get up close to the music, without mediation or interference.
Free Music Archive: An interactive library of high-quality, legal audio downloads directed by WFMU.
International Music Score Library Project (IMSLP): Library of scores and recordings that are CC-licensed or public domain in Canada.
Musopen: Recordings, sheet music, and textbooks for free, without copyright restrictions.
Open Goldberg Variations: The Open Goldberg Variations (Johann Sebastian Bach, BWV 988), played by Kimiko Ishizaka on a Bösendorfer 290 Imperial piano, are free to download and share.
Teoría: Music theory website by José Rodríguez Alvira. Peer reviewed web site by MERLOT and recipient of 2006 MERLOT Classic Award in music.
The Lester S. Levy Sheet Music Collection (John’s Hopkins): Browse over 30,000 pieces of American popular music, dating as far back as 1780.”